Improvement in lamf-chimneys



ring'.

:NEFEOD STATES PATENT OFFICE,

GEORGE MEDEEMAIE, OF OHIGAGQILLEOIs, AssIGNOE OF ONE-HALF Hrs EIGHT TO-oHAELEs KOPP, OF SAME PLAGE.

Specification forming part of Letters Patent No. 165, l 16, dated June 29, 1575; application filed April 3U, 1875.

'l'o all/whom it may concern:

Be itknown that I, GEORGE N1EDERMArR,ot` Chicago, in the county of (look and State of Illinois, have invented an Improvement in LnmpUhiiniieys, of which the following is e specification Y My invention consists in :t cylindrical chimney, built of light rods of glass, held in place by n double angedring at top and bottom, and, when designed for use on lamps, each chimney is surnionnted by n plain glass cone, which is held in place by n 1in-nge on the top Figure l is n perspective View. 'Fig` 2 is n Vertical section. Fig. 3 is ai cross-section.

In the drawing, A represents the body ot' the chimney, which is built up ot' rods a Of plain glass, either round, square, or an y other .form Ot' section, Whose lower ends are received in :t channel-ring, al, at the bottom of the chimney, their upper ends being` inserted in a similar ring, a2, et the top. This completes the chimney for an nrgand ges-burner; but Where it is to be used on e kerosene or other oil lamp it is surmounted by n plein glass cone, B, to increase the draft. This cone is held in piece by n beveled hoop'or flange ring, b, which is slipped over the base ot' the cone lnid the top-ring a2. The chimney-rods nre free to expend and contract independently Otl each other under changes ot' temperature, and, consequently, does awa-y with the difficulty heretofore experienced by the cracking Ot' solid chimneys from that canse, while the rods break up and retract tlie'beams ot' light from the inclosed flame, making the light soft and pleasant to the eye.

I do not claim, broadly, the invention of seperate glass rods, for such here been used before; but

What I claim as my invention is rEhe combination of the chimney A, composed of separate glass rods a, secured in metallic channel-rings, with the glass cone B, substantially as described and shown.

GEORGE NIEDEEMAIE.

Witnesses:

WM. H. LOTZ, CHAs. KROESOHELL. 

